Overflow device for pump-lamps



(No Model.) I 2 Sheets-Sheet 1.

T. W. HAMILTON.

OVERFLO-W DEVIGE FOR PUMP LAMPS. No. 326,427. Patented Sept. 15, 1885.

WITNESSES: INVENTOR QWMW I j BY ATTORNEY (No Model.) 2 Sheets-Sheet 2.

T. W. HAMILTON.

OVERFLOW DEVICE FOR. PUMP LAMPS.-

No. 326,427. Patented Sept. 15, 1885.

v I I Q3/2194 ATTORNEY u. PETERS, Pttwuttw m m Washington. u. c.

I Unrren STATES PATENT ()rrrcs.

THOMAS XV. HAMILTON, OF SPRINGFIELD, MASSACHUSETTS.

OVERFLOW DEV |CE FOR PUMP-LAMPS.

IJPECIFICATIQN forming part of Letters Patent No. 326,427, datedSeptember 15, 1885.

Application filed July 13, 1885. (No model.)

To all whom it may concern:

Be it known that I, THOMAS WV. HAMILTON, a citizen of the United States,residing at Springfied, in the county of Hampden and State ofMassachusetts, have invented new and useful Improvements in OverflowDevices for Pump-Lamps, of which the following is a specification.

This invention relates to improvements in overflow devices forpump-lamps, the object being to provide for such lamps an improvedadjustable overflow for conducting oil from one reservoir to the other,and improved means for regulating said overflow according to the numberof hours the lamp may be required to burn; and, furthermore, to providein such lamps improved means for preventing the wick from becomingderanged.

In the drawingsforming part of this specification, Figure 1 is aperspective View of a pump-lamp, showing a part of the side and top ofthe upper reservoir, the side of the wick-well, and a part of the burnerbroken away, embodying my improvements. Fig. 2 is a plan view of thelamp, indicating in dotted lines the form and location of certain partsin the interior thereof. Fig. 3 is a perspective view of the part of thelamp in which the overflow-pipe is located and of said pipe and itsswinging connection with the lamp. Fig. 4 is a side view ofthelifting-rod for'the overflow-pipe and of a part of the support forsaid rod, and a side view, partly in section,of the overflow-gage,showing its operative relation to said rod. Fig. 5 is a side view of theoverflow-gage.

In the drawings, A is the lower or main oilreservoir of the lamp, on thetop E of which is constructed the upper reservoir,having said top E forits bottom by securing the side piece, B, on thelatter and attaching thecover 'D to said piece B.

' The burner t is connected in the usual way with the cover or top D ofthe upper reservoir, and to the under side of the said top D is securedthe circular wick-well h, which extends downward nearly to the bottom E,whereby oil is permitted to flow under and upward within it to the wickf. If need be,

openings 3 may be made in the lower edge of the wick-well to stillfurther facilitate thefree flow of oil to the wick. The purpose of thewell h is to cause the wick to retain the folded position shown in Fig.1, and not to become twisted and deranged by the agitation of the oil,and from other causes, whereby its absorbent and oil-conductingqualities are more or less impaired. A metallic strip, m, extendsbetween the side of thewick-well and the side B of the upper reservoirto prevent the oil, as it escapes from the pump 8 from being thrown onto the wire-gauze 8, Fig. 2, which covers the peek-hole in the top D,thereby serving to keep said gauze clean, so that one may clearly seethe contents of the upper reservoir through it.

A suitable pump, 8, is fixed in the plate E, its lower end extending toor nearly to the bottom of reservoir A, and it is adaptedtobe operatedin the usual way to draw oil from said lower reservoir and to dischargeit into said upper reservoir.

The aforesaid gauze-covered peek-hole on the top D is provided with apivoted cover, 7, which isshown swung off from said hole in Fig. 2. Theusual screw-cap,5,is provided to stop the opening through which thereservoir A is supplied with oil.

An air-pipe, (I, is set in the plate E to facilitate the free movementof the oil from one reservoir to the other.

The hereinbelow-described adjustable overflow devices are provided forthe purpose of drawing off all surplus oil in excess of a given quantitythat may have been pumped into the upper reservoir from the lower one,whereby said surplusis returned to the latter, leaving a certain amountof oil in the upper reservoir to supply the burner t for a definitelength of time,'be it more or less, said amount of oil for burning.being determined by the height of the open end of the overflow-pipe 6above the bot tom of the upper reservoir, and the proper position of theend of said pipe is fixedby a variable gage which sets it to leave oilwhich will supply the burner for one or more or less hours, as may bedesired.

A trough-like depression, a, is formed in the bottom of the upperreservoir, in which the overflow-pipe e is hung, so that its open end,when it lies at an incline, may be low enough to draw nearly, if notquite, all of the 5 oil out from said reservoir.

In the side of the trough a, at one end, is tightly secured acylindrical piece, I), which serves the purpose of the barrel of a cookor faucet, for in said piece b is fitteditightly by grinding the hollowplug 0, (see dotted lines in Fig.3,) and said plug is secured to the endof the overflow-pipe 6, through the latter communicating with the hollowpassage in the plug in such a way that liquid entering the open end ofsaid pipe is discharged at the end of the plug a. plug 0 is placed inthe piece I), as in Fig. l, and the end ofa spring, 6, is placed againstthe end of the plug, thereby holding it in close contact with saidbarrel -piece b, but leaving it free enough to be turned by the pipe 6.the bottom of the upper reservoir and within the lower one, A.

Near the side of the trough and to one side thereof, on the bottom ofthe upper reservoir, is fixed a support, 1;, having a tubular hearing orguide, a, thereon for the liftingrod y, which passes through it, asshown, said rod being properly fitted therein to move rather tightly, sothat the rod willbe frictionally held in any position up or down towhich it may be moved. Said lifting-rod yhas a flat arm, a, securedthereon near its lower end, in which is a slot, 9, with which a pin, an,attached to the end of the overflow-pipe e, engages, whereby said pipehas its free end moved up and down and set in different positions abovethe bottom of the upper reservoir by sliding the rod y up and down.

The foresaid gage for setting the end of the pipe 6 as above describedis shown in Figs. 4 and 5, and is constructed and used as follows: Atube, 14, has a series of perforations, 15, therein-at differentdistances from the end. A plunger, 10, having a suitable head, is fittedto slide in the tube 14, and to the head thereof is secured a spring,12, having a pin, 13, attached to it, whose point enters either of saidperforations, thereby securing the tube on the plunger in differentpositions, whereby the. end of the plunger is caused to be nearer to orfarther from the open end of the tube 14, the latter being adapted byits internal diameter to be placed on the end of the lifting-rod y andhave its end brought down against the top of'the guide-bearingn. Thus,for example, (referring to Fig. 4,) the pin 13 being in a certainperforation in tube14, the end ofthe plunger is fixed at a distance fromthe end of the tube determined by the hole in which said pin engages. Inpractice, therefore, to prepare the lamp to be lighted and to give itoil, for, say,

two hours illumination, the upper end of the 55 rod y, which projectssomewhat above the top D, is seized and drawn upward, thereby liftasshown, the passage.

The Y The discharge end of plug cis below I trough ing up the free endof the overflow-pipe e. The pump sis then operated to transfer somewhatmore oil than is required for said term of burning from the lower to theupper reservoir. The said gage is then adjusted by sliding the tube onthe plunger 10 and securing the two as aforesaid, so that when the endof the tube is placed on the end of the rod 9 and pressed against theend of the bearing n the rod is driven down by the impact of the end ofthe plunger therewith,and the open end of the pipe 0 is thereby moveddown to such a height above the bottom of the upper reservoir as will,when all the oil in the latter which is above the level of the said endof the pipe 6 has run off through the latter, leave the requiredquantity to supply the burner t for the time to which the gage is set.

It is obvious that the end of the pipee may be set at different heightsfrom the bottom of the upper reservoir, and thereby leave more or lessoil in the latter without using the gage as aforesaid; but to attainaccuracy it is preferable to employ a-gage.

What I claim as my invention is l. The hereindescribed lamp,having anupper and a lower reservoir, the pump a, the trough a in the bottom ofthe upper reservoir, the overflow-pipe e,having a hollow pivotalconnection with the side of said trough, the lifting-rod y, connectedwith the free end of said pipe, and the lifting-rod support 1), combinedand operating substantially as set forth.

2. The herein-described lamp,havi ng an upper. and a lower reservoir,the pump the a inthebottom of the upper reservoir,

the barrel lg, fixed in the side of said trough, the hollow plugc,fitting said barrel, the overflow-pipe e, connected to said plug, theliftingrod y, having thearms z engaging with the free end of said pipe,and the lifting-rod support 1), having the bearingn thereon,conib.inedand operating substantially as set forth.

3. The combination, with the upper and lowerreservoirs of the lamp andvibratory overflow-pipe r, of the lifting-rod support 0, having thebearmg n thereon,the lifting-rod 3;, connected with the free end of saidpipe and passing through said bearing, and the pi peed jnsting gageconsisting of the plunger 10,having the spring 12 thereon, provided withthe pin 13, and the tube 14, fitting on said plunger and havinga seriesof perforations in its sides, substantially as set forth.

4. In a pump-lamp, the combination, with the vibratory overflow-pipe e,the lifting-rod y, and the support 1), having the frictional hearing itthereon, of the pipe-adjusting gage consisting of the perforated tube14, and the plunger 10, having the spring 12 thereon provided with thepin 13 to engagein the perforations in said pipe.

THOMAS W. HAMILTON. Witnesses:

H. A. CHAPIN, J. D. GARFIELD.

